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<?php |
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namespace EventEspresso\core\services\orm\tree_traversal; |
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use EE_Base_Class; |
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/** |
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* Class Visitor |
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* |
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* Stores info about an entity in a model relations tree |
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* |
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* @package Event Espresso |
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* @author Mike Nelson |
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* @since $VID:$ |
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* |
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*/ |
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class EntityNode extends BaseNode |
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{ |
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/** |
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* @var EE_Base_Class |
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*/ |
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protected $initialInstance; |
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/** |
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* @var RelationNode[] |
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*/ |
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protected $relation_nodes; |
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public function __construct( $instance) |
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{ |
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$this->initialInstance = $instance; |
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} |
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public function discover(){ |
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foreach($this->initialInstance->get_model()->relation_settings() as $relation){ |
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if($relation->block_delete_if_related_models_exist()){ |
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$this->relation_nodes[] = new RelationNode($this->initialInstance, $relation); |
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} |
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} |
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} |
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/** |
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* Whether this item has already been initialized |
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*/ |
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public function isDiscovered() |
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{ |
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// TODO: Implement isDiscovered() method. |
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} |
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/** |
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* @since $VID:$ |
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* @return boolean |
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*/ |
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public function isComplete() |
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{ |
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if($this->complete == null){ |
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$this->complete = true; |
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foreach($this->relation_nodes as $relation_node){ |
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if(! $relation_node->isComplete()){ |
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$this->complete = false; |
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break; |
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} |
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} |
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} |
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return $this->complete; |
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} |
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/** |
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* |
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* @since $VID:$ |
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* @param $work_to_do |
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* @return int units of work done |
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*/ |
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protected function work($work_to_do) |
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{ |
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$units_worked = 0; |
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foreach($this->relation_nodes as $relation_node){ |
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if(! $relation_node->isComplete()){ |
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$units_worked += $relation_node->visit($work_to_do); |
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} |
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if($units_worked >= $work_to_do){ |
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break; |
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} |
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} |
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return $units_worked; |
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} |
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} |
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// End of file Visitor.php |
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// Location: EventEspresso\core\services\orm\tree_traversal/Visitor.php |
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If an expression can have both
false, andnullas possible values. It is generally a good practice to always use strict comparison to clearly distinguish between those two values.